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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Composition of Nonaccrual Loans (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Total non-accrual loans	$ 55,920	$ 35,900
Nonaccrual Loans with no ACL	52,385	32,066
NTM Loans
Financing Receivable, Past Due [Line Items]
Total non-accrual loans	11,652	8,697
Traditional Loans
Financing Receivable, Past Due [Line Items]
Total non-accrual loans	44,268	27,203
Commercial | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total non-accrual loans	13,475	13,821
Nonaccrual Loans with no ACL	13,324	13,088
Commercial | Commercial real estate
Financing Receivable, Past Due [Line Items]
Total non-accrual loans	5,834	4,654
Nonaccrual Loans with no ACL	5,834	4,654
Commercial | SBA
Financing Receivable, Past Due [Line Items]
Total non-accrual loans	4,179	3,749
Nonaccrual Loans with no ACL	796	648
Commercial | Construction
Financing Receivable, Past Due [Line Items]
Total non-accrual loans	0	0
Nonaccrual Loans with no ACL	0	0
Commercial | NTM Loans | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total non-accrual loans	0	0
Commercial | NTM Loans | Commercial real estate
Financing Receivable, Past Due [Line Items]
Total non-accrual loans	0	0
Commercial | NTM Loans | SBA
Financing Receivable, Past Due [Line Items]
Total non-accrual loans	0	0
Commercial | NTM Loans | Construction
Financing Receivable, Past Due [Line Items]
Total non-accrual loans	0	0
Commercial | Traditional Loans | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total non-accrual loans	13,475	13,821
Commercial | Traditional Loans | Commercial real estate
Financing Receivable, Past Due [Line Items]
Total non-accrual loans	5,834	4,654
Commercial | Traditional Loans | SBA
Financing Receivable, Past Due [Line Items]
Total non-accrual loans	4,179	3,749
Commercial | Traditional Loans | Construction
Financing Receivable, Past Due [Line Items]
Total non-accrual loans	0	0
Consumer | Single family residential mortgage
Financing Receivable, Past Due [Line Items]
Total non-accrual loans	32,432	13,519
Nonaccrual Loans with no ACL	32,431	13,519
Consumer | Other consumer
Financing Receivable, Past Due [Line Items]
Total non-accrual loans	0	157
Nonaccrual Loans with no ACL	0	157
Consumer | NTM Loans | Single family residential mortgage
Financing Receivable, Past Due [Line Items]
Total non-accrual loans	11,652	8,697
Consumer | NTM Loans | Other consumer
Financing Receivable, Past Due [Line Items]
Total non-accrual loans	0	0
Consumer | Traditional Loans | Single family residential mortgage
Financing Receivable, Past Due [Line Items]
Total non-accrual loans	20,780	4,822
Consumer | Traditional Loans | Other consumer
Financing Receivable, Past Due [Line Items]
Total non-accrual loans	$ 0	$ 157

X

- Definition

Amount of financing receivable on nonaccrual status with no allowance for credit loss.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 16
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919258-210447

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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Topic 310
-SubTopic 10
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Topic 326
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-URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919258-210447

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph (a)
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-K (SK)
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